diff --git a/api/gateway/chain/client/rail_gateway_test.go b/api/gateway/chain/client/rail_gateway_test.go
index 81defdfa..95dac86f 100644
--- a/api/gateway/chain/client/rail_gateway_test.go
+++ b/api/gateway/chain/client/rail_gateway_test.go
@@ -7,7 +7,7 @@ import (
 )
 
 func TestNewRailGateway_NormalizesRail(t *testing.T) {
-	gw := NewRailGateway(nil, RailGatewayConfig{Rail: "card_payout", Network: "tron"})
+	gw := NewRailGateway(nil, RailGatewayConfig{Rail: "card", Network: "tron"})
 	if got, want := gw.Rail(), discovery.RailCardPayout; got != want {
 		t.Fatalf("unexpected rail: got=%q want=%q", got, want)
 	}
diff --git a/api/gateway/chain/internal/service/gateway/service.go b/api/gateway/chain/internal/service/gateway/service.go
index ad157adf..437bd0da 100644
--- a/api/gateway/chain/internal/service/gateway/service.go
+++ b/api/gateway/chain/internal/service/gateway/service.go
@@ -223,6 +223,7 @@ func (s *Service) startDiscoveryAnnouncers() {
 		}
 		announce := discovery.Announcement{
 			ID:         discovery.StableCryptoRailGatewayID(string(network.Name)),
+			InstanceID: discovery.InstanceID(),
 			Service:    "CRYPTO_RAIL_GATEWAY",
 			Rail:       discovery.RailCrypto,
 			Operations: discovery.CryptoRailGatewayOperations(),
diff --git a/api/gateway/tron/client/rail_gateway_test.go b/api/gateway/tron/client/rail_gateway_test.go
index 81defdfa..95dac86f 100644
--- a/api/gateway/tron/client/rail_gateway_test.go
+++ b/api/gateway/tron/client/rail_gateway_test.go
@@ -7,7 +7,7 @@ import (
 )
 
 func TestNewRailGateway_NormalizesRail(t *testing.T) {
-	gw := NewRailGateway(nil, RailGatewayConfig{Rail: "card_payout", Network: "tron"})
+	gw := NewRailGateway(nil, RailGatewayConfig{Rail: "card", Network: "tron"})
 	if got, want := gw.Rail(), discovery.RailCardPayout; got != want {
 		t.Fatalf("unexpected rail: got=%q want=%q", got, want)
 	}
diff --git a/api/gateway/tron/internal/service/gateway/options.go b/api/gateway/tron/internal/service/gateway/options.go
index 34c8571b..03499bfe 100644
--- a/api/gateway/tron/internal/service/gateway/options.go
+++ b/api/gateway/tron/internal/service/gateway/options.go
@@ -55,7 +55,7 @@ func WithNetworks(networks []shared.Network) Option {
 			}
 			for i := range clone.TokenConfigs {
 				clone.TokenConfigs[i].Symbol = strings.ToUpper(strings.TrimSpace(clone.TokenConfigs[i].Symbol))
-				clone.TokenConfigs[i].ContractAddress = strings.ToLower(strings.TrimSpace(clone.TokenConfigs[i].ContractAddress))
+				clone.TokenConfigs[i].ContractAddress = strings.TrimSpace(clone.TokenConfigs[i].ContractAddress)
 			}
 			clone.Name = network.Name
 			s.networks[clone.Name.String()] = clone
diff --git a/api/gateway/tron/internal/service/gateway/service.go b/api/gateway/tron/internal/service/gateway/service.go
index 650680cf..e9d49a6b 100644
--- a/api/gateway/tron/internal/service/gateway/service.go
+++ b/api/gateway/tron/internal/service/gateway/service.go
@@ -228,6 +228,7 @@ func (s *Service) startDiscoveryAnnouncers() {
 		}
 		announce := discovery.Announcement{
 			ID:         discovery.StableCryptoRailGatewayID(network.Name.String()),
+			InstanceID: discovery.InstanceID(),
 			Service:    "CRYPTO_RAIL_GATEWAY",
 			Rail:       discovery.RailCrypto,
 			Operations: discovery.CryptoRailGatewayOperations(),
diff --git a/api/gateway/tron/internal/service/gateway/service_test.go b/api/gateway/tron/internal/service/gateway/service_test.go
index f1195b49..fdf28a88 100644
--- a/api/gateway/tron/internal/service/gateway/service_test.go
+++ b/api/gateway/tron/internal/service/gateway/service_test.go
@@ -18,6 +18,7 @@ import (
 	"go.uber.org/zap"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
+	"google.golang.org/protobuf/types/known/structpb"
 
 	"github.com/tech/sendico/gateway/tron/internal/keymanager"
 	"github.com/tech/sendico/gateway/tron/internal/service/gateway/drivers"
@@ -88,6 +89,56 @@ func TestCreateManagedWallet_NativeTokenWithoutContract(t *testing.T) {
 	require.Empty(t, resp.GetWallet().GetAsset().GetContractAddress())
 }
 
+func TestCreateManagedWallet_ResolvedContractPreservesCase(t *testing.T) {
+	svc, _ := newTestService(t)
+	ctx := context.Background()
+
+	resp, err := svc.CreateManagedWallet(ctx, &ichainv1.CreateManagedWalletRequest{
+		IdempotencyKey:  "idem-contract-case",
+		OrganizationRef: "org-1",
+		OwnerRef:        "owner-1",
+		Asset: &ichainv1.Asset{
+			Chain:       ichainv1.ChainNetwork_CHAIN_NETWORK_TRON_MAINNET,
+			TokenSymbol: "USDT",
+		},
+	})
+	require.NoError(t, err)
+	require.NotNil(t, resp.GetWallet())
+	require.Equal(t, "TR7NHqjeKQxGTCi8q8ZY4pL8otSzgjLj6t", resp.GetWallet().GetAsset().GetContractAddress())
+}
+
+func TestOpenAccount_PreservesContractAddressCase(t *testing.T) {
+	svc, _ := newTestService(t)
+	ctx := context.Background()
+
+	const contract = "TR7NhQjeKQxGTCi8q8ZY4pL8otSzgjLj6T"
+	params, err := structpb.NewStruct(map[string]interface{}{
+		"organization_ref": "org-1",
+		"network":          "TRON_MAINNET",
+		"token_symbol":     "USDT",
+		"contract_address": contract,
+	})
+	require.NoError(t, err)
+
+	resp, err := svc.OpenAccount(ctx, &connectorv1.OpenAccountRequest{
+		IdempotencyKey: "idem-open-account-contract-case",
+		Kind:           connectorv1.AccountKind_CHAIN_MANAGED_WALLET,
+		Asset:          "USDT-TRC20",
+		OwnerRef:       "owner-1",
+		Params:         params,
+	})
+	require.NoError(t, err)
+	require.NotNil(t, resp)
+	require.Nil(t, resp.GetError())
+	require.NotNil(t, resp.GetAccount())
+
+	details := resp.GetAccount().GetProviderDetails()
+	require.NotNil(t, details)
+	field, ok := details.GetFields()["contract_address"]
+	require.True(t, ok)
+	require.Equal(t, contract, field.GetStringValue())
+}
+
 func TestListAccounts_OrganizationRefFilters(t *testing.T) {
 	svc, _ := newTestService(t)
 	ctx := context.Background()
diff --git a/api/gateway/tron/shared/helpers.go b/api/gateway/tron/shared/helpers.go
index 6677ab02..e834e9d3 100644
--- a/api/gateway/tron/shared/helpers.go
+++ b/api/gateway/tron/shared/helpers.go
@@ -38,7 +38,7 @@ func ResolveContractAddress(tokens []TokenContract, symbol string) string {
 	upper := strings.ToUpper(symbol)
 	for _, token := range tokens {
 		if strings.EqualFold(token.Symbol, upper) && token.ContractAddress != "" {
-			return strings.ToLower(token.ContractAddress)
+			return strings.TrimSpace(token.ContractAddress)
 		}
 	}
 	return ""